"4.Pretending you know what you're doing is almost the same as knowing" - no, it's not. And such hubris can prevent knowledge discovery (besides the loss of reputation).
I think the way it's presented (the use of "pretending" in particular) is poor, but I think the idea behind it is good. Not knowing what you're doing shouldn't stop you from doing it, it simply means you have things to learn before you're done. If you're willing to accept that and seek knowledge and help where appropriate (and don't deceive others about it, as pretending tends to imply), behaving as if you know what you're doing is a good means of personal growth and getting fresh ideas into a project you're joining.
The mass line represents the creative and productive energies of the masses of the Cult of Done, which are potentially inexhaustible.
To hear incorrect views without rebutting them and even to hear counter-revolutionary remarks without reporting them, but instead to take them calmly as if nothing had happened, is a failure of Done.
